Salt-spray-corrosion-resistant parallel seam welding alloy cover plate and preparation method thereof

A technology of parallel seam welding and salt spray resistance, which is applied in metal material coating process, semiconductor/solid-state device manufacturing, superimposed layer plating, etc., which can solve problems such as circuit reliability hidden dangers and exposed substrates, and achieve good Anti-salt spray corrosion performance, ensure integrity, enhance the effect of salt spray corrosion resistance

Pending Publication Date: 2021-11-26
58TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a salt-spray corrosion-resistant parallel seam welding alloy cover plate, to solve the problem that the conventional parallel seam welding alloy cover plate adopting electroless nickel plating causes the Kovar substrate to melt due to the melting of the coating during the parallel seam welding process. Exposure, resulting in the hidden danger of circuit reliability caused by corrosion failure in the salt spray test, the specific technical plan is:

Method used

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  • Salt-spray-corrosion-resistant parallel seam welding alloy cover plate and preparation method thereof
  • Salt-spray-corrosion-resistant parallel seam welding alloy cover plate and preparation method thereof
  • Salt-spray-corrosion-resistant parallel seam welding alloy cover plate and preparation method thereof

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Effect test

Embodiment 1

[0030] Such as Figure 4 As shown, a salt spray corrosion-resistant parallel seam welding alloy cover plate includes an alloy cover plate body 1, a diamond layer 2 is provided on the side and upper surface of the alloy cover plate body 1, and a diamond layer 2 is provided on the lower surface of the alloy cover plate body 1. The outer wrap is covered with a first protective layer 3 .

[0031] The thickness of the diamond layer is 0.1 μm to 15 μm.

[0032] The first protective layer 3 is a nickel layer, and the thickness of the nickel layer is 2 μm˜8.89 μm. The nickel in the nickel layer is a nickel-phosphorus alloy with a melting point of 880°C. The weight ratio of phosphorus in nickel-phosphorus alloy is 8%~12%.

[0033] Generally speaking, the parallel seam welding process will inevitably damage the cover plate body and coating, and the damage can only be controlled through process improvement, but cannot solve the problem of damage to the cover plate body and coating fro...

Embodiment 2

[0035] A salt spray corrosion-resistant parallel seam welding alloy cover plate, comprising an alloy cover plate body 1, a diamond layer 2 is provided on the side and upper surface of the alloy cover plate body 1, and the lower surface of the alloy cover plate body 1 and the diamond layer 2 are wrapped with The first protective layer 3 also includes a second protective layer wrapped on the first protective layer, the second protective layer is a gold-plated layer, and the first protective layer is a nickel layer.

[0036] The thickness of the gold-plated layer is 0.01-6 μm. The nickel in the nickel layer is high-purity nickel with a melting point of 1455°C, and the gold in the gold-plated layer is pure gold with a melting point of 1064°C.

Embodiment 3

[0038] Such as Figure 1 to Figure 4 Shown, a kind of preparation method of salt spray corrosion resistant parallel seam welding alloy cover plate comprises the following steps:

[0039] S10: The alloy cover body 1 is obtained by machining;

[0040] S20: After the alloy cover body 1 is cleaned, coat the isolation layer 30 on the lower surface, and dry the isolation layer 30;

[0041] S30: coating the upper surface and side surfaces of the alloy cover plate body 1 with diamond to form a diamond layer;

[0042] S40: removing the isolation layer 30, washing and drying;

[0043] S50: performing nickel plating on the alloy cover body 1 to obtain a first protective layer 3;

[0044] S60: After cleaning and drying, the production of the parallel seam welding alloy cover plate is completed.

[0045] The above method obtains a salt spray corrosion resistant parallel seam welded alloy cover plate of the first embodiment.

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Abstract

The invention relates to integrated circuit electronic packaging, in particular to a salt-spray-corrosion-resistant parallel seam welding alloy cover plate and a preparation method thereof. The salt-spray-corrosion-resistant parallel seam welding alloy cover plate is characterized by comprising an alloy cover plate body, diamond layers are arranged on the side faces and the upper surface of the alloy cover plate body, and the lower surface of the alloy cover plate body and the diamond layers are wrapped with first protective layers. The salt-spray-corrosion-resistant parallel seam welding alloy cover plate provided by the invention has better salt-spray-corrosion resistance, can meet the harsh salt-spray environment application requirements of integrated circuit products, and realizes the high reliability requirements of parallel seam welding packaging devices.

Description

technical field [0001] The invention relates to an integrated circuit electronic package, in particular to a salt spray corrosion-resistant parallel seam welding alloy cover plate and a preparation method thereof. Background technique [0002] Parallel seam welding is the most commonly used packaging form in high-reliability hermetic ceramic packaging. This technology uses the principle of resistance welding to realize the welding of the lower surface of the cover and the heat generated by the pulse power applied to the surface of the cover by the roller electrode. The melting and re-solidification of the coating on the surface of the frame realizes the welding of the cover plate and the welding frame. As the roller electrode rolls on the cover plate, under the action of pulse power, the solder joints are formed one by one and overlapped with each other to form fish scale-like joint welds to achieve airtight packaging. Since the heat of the parallel seam welding process is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/04H01L23/00H01L23/29H01L23/31H01L21/56C23C28/00
CPCH01L23/04H01L23/564H01L23/29H01L23/3157H01L23/31H01L21/56C23C28/322C23C28/34
Inventor 徐中国蒋涵孙建波
Owner 58TH RES INST OF CETC
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